Shocking helicopter footage captures the moment Nicholas Salvador, who is wielding a machete tries to escape the Metropolitan Police in Edmonton, north London. Nicholas Salvador killed 82-year-old Palmira Silva in September last year.

Salvador was found not guilty today after being deemed insane by the jury at The Old Bailey.

In the video, Salvador can be seen smashing through fences, close to oblivious children playing in their back gardens. A police officer who is scaling the roof can be seen warning them to go inside.

The pilot of the helicopter can also be heard saying ‘We need officers in this premises ASAP. Stand by, we have officers at the front – this man has decapitated a person.’

The 25-year-old will be put away in a psychiatric hospital under the Mental Health Act.